SOSD is a volunteer run shelter for dogs that believes in a more humane approach for Singapore’s strays. They oppose culling of stray animals. Instead SOSD, rescues, rehabilitates and rehome strays.
SOSD is looking for like-minded volunteers. They have a variety of avenues for would be volunteers to contribute in.
Check out the link above for more information. There is a form on their site to register as a volunteer. You can also sponsor a dog. You may also choose donate money towards their cause.